CnGlass brand is committed to producing high quality double wall glass mugs and glass teapots, we have our own factory, and the products are sold all over the world. Hand blown This is the most traditional craft and using hand blown.It takes about 20 kinds of processes to make a double wall glass mugs.Somebody said it may be made from plastic,but actually not.It is true glass!The glass mugs is made of high borosilicate glass,it would be lighter than the normal glass,but durable and stable. Double Wall Insulated Glass Cup Made of heat and condensation-resistant borosilicate glass, which is more durable and stronger than common glass.Double wall design can prevent from burning hand.Remains cool to touch,keep your hand safe and keep the beverage hot Why Choose CNGLASS Glass Mugs? High-Quality Borosilicate Glass Microwave safe up to 350°F/180° C. Oven safe up to 350°F/180° C. Dishwasher safe Healthy Choice Well Package Light Up A New Day with CNGLASS Coffee Mug! A Cup of Coffee for the morning is Always a Plus! These glass coffee mugs can perfectly meet the needs of your daily life.They can be your ideal partner of morning coffee,latte,mocha,espresso,cappuccino,decaf,etc When you are reading,when you are meditating,when you are tired from work,just enjoy your coffee with a CNGLASS cup to get enough positive energy. GREAT GIFT FOR COFFEE LOVERS Classic and elegant, durable glass mugs can be the ideal gift for birthday, festival, wedding, party, bringing elegance and happiness to your family and friendsPacked in an elegant and stylish gift box CNGLASS Glass Coffee Mugs 12oz CNGLASS Glass Coffee Mugs 8.5oz CNGLASS Glass Teapot 27oz CNGLASS Glass Tea Cups 10oz CNGLASS Glass Teapot 37.5oz CNGLASS Glass Mug 5oz Buying Options Buying Options Buying Options Buying Options Buying Options Buying Options Customer Reviews 4.6 out of 5 stars 434 4.5 out of 5 stars 345 4.5 out of 5 stars 325 4.3 out of 5 stars 225 4.5 out of 5 stars 173 4.6 out of 5 stars 267 Price $21.24$21.24 $16.98$16.98 $21.24$21.24 $12.74$12.74 $21.24$21.24 $21.23$21.23 Material Borosilicate Glass Borosilicate Glass Borosilicate Glass Borosilicate Glass Borosilicate Glass Borosilicate Glass Insulated Glass ✓ ✓ ✓ ✓ ✓ ✓ Capacity 12 Ounces 8.5 Ounces 27 Ounces 10 Ounces 37.5 Ounces 5 Ounces Dishwasher Safe ✓ ✓ ✓ ✓ ✓ ✓ Microwave safe ✓ ✓ ✓ ✓ ✓ ✓ Packed In a Gift Box ✓ ✓ ✓ ✓ ✓ ✓